Disk for rotary mower knives



FIG. 1 is a perspective view of the disk for rotary mower knives showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a disk for rotary mower knives, as shown and described. 